There are alternatives.
Please don't scrap your diesel for a failed vacuum pump.

I am raising this topic because the OEM 'mechanical' vacuum pump, NEW; repair parts / pumps are no longer available, or prohibitively HIGH priced for most owners.

If you know of moderate / low cost, high durability, quality pumps, please post them here.

If you know of DIY 12V vacuum systems that will work with W126, 123, 114/115, and older diesels, "PLEASE" post any links here.

brake booster vacuum pump kit 12 volt
https://duckduckgo.com/?q=brake+booster+vacuum+pump+kit+12+volt&t=ffab&atb=v345-1&iar=images&iax=images&ia=images

Universal Power Brake Booster 12V Electric Vacuum Pump Kit
https://duckduckgo.com/?q=Universal+Power+Brake+Booster+12V+Electric+Vacuum+Pump+Kit&t=ffab&atb=v345-1&iar=images&iax=images&ia=images

12v vacuum pump switches for brake booster
https://duckduckgo.com/?q=12v+vacuum+pump+switches+for+brake+booster&t=ffab&atb=v345-1&iar=images&iax=images&ia=images

12v vacuum pump for brake booster
https://duckduckgo.com/?q=12v+vacuum+pump+for+brake+booster&t=ffab&atb=v345-1&iar=images&iax=images&ia=images

Thank you.

__________________
ASE Master Mechanic
https://whunter.carrd.co/

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
2003 Volvo V70

https://www.boldegoist.com/

I was searching on the internet for OM616/617 Vacuum pumps to see what was out there.
I came across his thread over on Benz World from back in 2010, where the guy installed
a Belt driven vacuum Pump from the Ford 6.9/7.3 IDI Diesel, and was also used for the Power Strokes.
I have 2 F-250`s both 6.9, and had the thought why couldn`t one be made to fit these engines?
This guy installed it on (I think) a OM606.
Click on the picture and it expands to about 6 of them.

https://www.benzworld.org/threads/vacuum-pump-substitution.1532745/



Charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

That is a cool link.

vacuum pump diesel engine
https://duckduckgo.com/?t=ffab&q=vacuum+pump+diesel+engine&atb=v345-1&ia=web


Thank you
.

__________________
ASE Master Mechanic
https://whunter.carrd.co/

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
2003 Volvo V70

https://www.boldegoist.com/

Back in 1981 I bought a new Datsun 720 KC 5-spd with the Nissan
SD-22 Diesel engine.
The Alternator has a Vacuum Pump on the rear, that has a splined shaft
that drives the Pump. Has an Oil Line supplying Engine oil to it, and a
return back to the Oil Pan.
Never gave me any problems, though I did replace the original Alternator
around 180K miles as I remember and the replacement around the same mileage.
The Pump never gave me any problems, and always had brakes.

Back then the Alternators were made in Japan.

Still have the Datsun, lost #2 cylinder around 480K miles.
Drove it for 30 years.

Here is an Amazon listing for one.

https://www.amazon.com/Alternator-Compatible-Replacement-%E2%80%8E291276-000-0-897023-733-1/dp/B0073GGSKK


Charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

It has been discussed before. The issue with Mercedes is if it has an automatic transmission there is always a vacuum leak from the vacuum valve. It is not a sealed system.

My Volvo diesel had a weak vacuum pump so I T-ed in an Eletric vacuum pump that works off of the break light circuit (I used a relay). When I step on the brakes the Eletric vacuum pump turns on. I also added a larger vacuum reservoir.

Concerning the Mercedes (Pierburg) piston type vacuum pumps does anyone really believe that their electric vacuum pump is going to hold up for like 30 years of use?

Post 9 has a pic of the vacuum pump I used in the Volvo.

IP fuel shutoff.

__________________
84 300D, 82 Volvo 244Gl Diesel

I drove around locally a bit but the vacuum pump I used got hot and I did not know if that was normal and also I had no vacuum shutoff switch to shut it off if full vacuum was achieved.

Electric Vacuum/Brake Booster Pump Tested

__________________
84 300D, 82 Volvo 244Gl Diesel

My 95 Isuzu NPR has a similar alternator vacuum pump setup.

__________________
1985 300D
The rest:
1957 MGA (comatose)
1965 Falcon (sleeping)
1966 E-100 (rust test in progress)
1976 Ford 3400 D Tractor (workhorse)
1978 Mercury Zephyer (5L playtoy)
1995 Isuzu NPR D (fetcher)
1998 Subaru Legacy (Spare)
2000 Toyota Sienna (School bus)
2008 Toyota Prius (Commuter)

Those trucks are 1 ton or 1 1/2 ton? and usually automatics?

Also the International Scout used the Nissan SD-33 Diesel engine,
a 6 cylinder, and used the Alternator Vac pump.
80 last year was only yr with a Turbo.


Charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

This is the cab-over medium duty truck, 3 ton capacity. Has a 3.9l 4cyl diesel with auto. It goes OK but does struggle with loads and hills. (The 240D of trucks ;-)

__________________
1985 300D
The rest:
1957 MGA (comatose)
1965 Falcon (sleeping)
1966 E-100 (rust test in progress)
1976 Ford 3400 D Tractor (workhorse)
1978 Mercury Zephyer (5L playtoy)
1995 Isuzu NPR D (fetcher)
1998 Subaru Legacy (Spare)
2000 Toyota Sienna (School bus)
2008 Toyota Prius (Commuter)

If your where to go the route outlined above by Charmalu, using the pump from amazon link. What kind of modification would be needed to install this unit on a 616 or a 617 engine.
From what I can see, there are two things to consider. First would be the electrical hookup, 2nd is the physical mountings. As for the electrical this has a three post for the output, which is similar to our 617 engines. It also has what appears to be a separate 12 v battery source to do the initial charge on the field windings. I assume it has an internal regulator ? As for physically mounting to the block, I'm not sure. It appears to have the same type bottom mounting as the ones on our 617 engines, but maybe some minor case modifications would be needed.
Has anyone installed this before ?